Calf-wheel shaft



R. L. REHART CALI WHEEL SHAFT May 5, 1925.

Filed March 12, 1925 INVENTOR. fay L Reba/"f BY A ATTORNEYS.

PatentedMay 5, I925. i

UNITED STATES PATENT ops-n3 v RAY L. REHART, or GLENDALE, CALIFORNIA.

GALE-WHEEL SHAFT.

Application filed March 12, 1923. Serial No. 624,441.

To all whom it may concern:

Be it known that I, RAYLQREHART, a citizen of the United States, and resident of Glendale, in the county of Los Angeles and State of California, have invented new and useful Improvements in a Calf-Wheel Shaft, of which the following is a specification.

This l 1V8l1tlOI1 18lltES. to a reel for winding cable or rope thereon and pertains more especially to a reel soarranged that'the cable or rope is fed olf center. a

The device disclosed herein as embodying the invention is what is commonly known as a calf wheel employed in well drilling. This well or reel is used for lowering and pulling casing. The crown pulley is disposed at the top center of the derrick and the drilling cable is passed thereover. The bull wheel on which is wound the drilling cable-is disposed in the derrick so that the reel is centered with respect to the crown block, and the cable spools thereon with ease. The calf wheel, however, is disposed on one side of the derrick creating a side pull on the cable. in order to make the cable spool thereon, it has been the custom to tilt the reel or shaft with respect to the horizontal so that the cable will wind upon the surface of the shaft normal climb. a p v Tilting the shaft is accomplishedby lowering one of the bearings and this produces a tilted wheel. The calf wheel drive rope or chain passing over the tilted calf wheel has a tendency to run off the rim thereby creating trouble. The primary object of this invention is to provide a tapered shaft serving as a reel and having a degree of taper such as to provide for correct spooling'of the cable and to keep the calf wheel straight.

These objects together with other objects and corresponding accomplishments are obtained by means of the embodiment of my invention illustrated in the accompanying drawing, in which:

Fig. 1 is aside elevation of a calf wheel; Fig. 2 is a frontelevation; "and Fig. ,3 is a diagrammatic plan view of a drilling rig with my improved calf wheel structure mounted therein.

to its axis and will not flange for the reel,

of the calf wheel are 111g indicated by B with A tapered shaft 3 may be provided adjacent its small end with a upon which the hub t of the wheel may be pressed or otherwise secured thereto. The shaft is preferably hollow and has cylindrical portion,

pressed into the small end thereof a calf Pressed into the other a spool gudgeon 6. A gudgeon serves as one wheel gudgeon 5. end of the shaft is flange ofthe spool the other flange.

Built up upon the hub 4: by means of arms, braces, and cants is the calf wheel 7.

while the hub serves as Asshown herein, there is a sprocket rim 8 s attached to the wheel. However, a grooved rim maybe used. The details of assembly not material to the present invention.

The calf wheel A and shaft are placed in position in the derrick the floor thereof hethe gudgeons, in horizontal alignment, the smaller endof the shaft being at the further end from the crown block. The bull wheel Cis in line withthe crown pulley D. It is obvious that the pull upon the cable will then be substantially normal to the surface elements of the calf wheel shaft. In this position. the

cable spools upon the shaft without climbing. Furthermore, the calf wheel may be in line .with the driving wheel of the rig so thatv there is no tendency for the sprocket chain to run off the sprocket. p

What I claim is: In a drillingrig centrally disposed, a calf wheel disposed to one side of said crown pulley. said calf wheel comprising a tapered shaft having a drive wheel mounted on the smaller end thereof, said drive wheel having its plane disposed normal to the axis of said shaft.

In witness that I claim the foregoing I have hereunto subscribed my name this 27th day of February, 1923.

, RAY L. REHART.

having a crown pulley 

